UK Property Flip Appraisal Calculator

An interactive browser version of the uploaded Flip Template. Change the blue-style input fields and the acquisition, finance, holding, sale, profit, yield and stress-test calculations update instantly.

Enter assumptions

Net Profit: —ROI: —Cash Required: —Stress: —

How to use: Enter or change the assumptions below. Calculated outputs are formula-driven in the browser. The calculation logic follows the uploaded spreadsheet, while the presentation has been redesigned to match the uploaded Property Prompts HTML.

Important: Some source spreadsheet formulas contain fixed assumptions (for example 2% arrangement fee, 1% exit fee and a £1,000 finance allowance). These have been preserved where they are part of the workbook formula logic.

Editable assumptions

Property & finance inputs

Purchase Price

Estimated Refurb Cost

After Repair Value / GDV

Estimated Hold Time

Funds 1 (Mortgage)

Interest Rate on Funds 1 (monthly)

Interest Rate on Funds 2

Broker + Legal (fixed)

Estimated Property Taxes

Council Tax (annual)

Auction Premium

Bridging Exit Fee

Purchase Legal Fee

Other Purchase Costs

Insurance (annual)

Holding Interest (annual)

Utility Costs (monthly)

Estate Agent Fee

Sale Legal Fees

Other Sale Costs

Stress-test GDV reduction

Estimated Monthly Rent

Total Acquisition Cost—

Total Project Cost—

Net Sale Proceeds—

Estimated Net Profit—

ROI on Project Cost—

Annualised ROI—

Purchase analysis

Acquisition & financing

Funds 1 amount
Funds 2 percentage
Funds 2 amount
Interest incl. 1-month buffer
Arrangement fee (2%)
Exit fee (1%)
Financing costs — workbook formula
Total purchase / acquisition cost
Additional funds required

Holding costs

Estimated holding cost analysis

Insurance for hold period
Interest for hold period
Utilities for hold period
Financing costs
Total holding costs

Refurbishment

Refurb cost planner

The workbook contains a detailed labour/material schedule. Edit any line below; the table calculates its own detailed total. You can then copy that total into the main “Estimated Refurb Cost” assumption using the button.

Item	Labour	Materials	Total
Strip-out & waste removal			£0
New kitchen (mid-range)			£0
New bathroom			£0
New combi boiler & heating controls			£0
Radiator upgrades & plumbing			£0
Electrical rewire/consumer unit			£0
Double-glazed windows			£0
Loft insulation			£0
Internal wall insulation (targeted)			£0
Plaster repairs			£0
Flooring throughout			£0
Decoration throughout			£0
Doors, ironmongery & joinery			£0
Contingency (10%)	—	—
Detailed refurbishment total

Profit analysis

Sale & return analysis

Estimated gross sales price / GDV
Estate agent fee
Sale legal fees
Other sale costs
Net sales price
Total project cost
Estimated net profit
ROI on total project cost
Annualised ROI
Profit on GDV